Firing control device for the trigger mechanism of repeating shotguns



May 25, 1965 E. FIRING CONTROL DEVICE FOR THE TRIGGER MECHANISM ,OF

o KLEBE 184,875

REPEATING SHOTGUNS Filed May 14, 1964 FIEI INVENTOR.

IQ/aw 0. 1555 United States Patent O HIRING CNTRGL DEI/ECE FR THE TRIGGER MECHANESM F REPEATING SIIIGJNS Erich (i. Klebe, lite. l., Zimmerman, Minn. Filed May I4, 1964, Ser. No. 367,345 3 Claims. (Qi. 2n-69) This invention relates broadly to firearms and more particularly to an automatic safety tiring control therefor.

While this invention is particularly intended for use on a certain well known repeating type shotgun, as the same will hereinafter be referred to, to correct a serious and dangerous defect found therein, it will be understood that the same is capable of being adapted to any repeating type shotgun known in the trade as the pump or slide action type.

It is well known in the firearm trade that certain well known repeating Shotguns of the type described will, if the shooter does not coordinate his thinking with the manipulation of the repeating actions, inadvertently causes the following round of loaded ammunition to be discharged if finger pressure on the primary trigger is not fully released between the manipulation of said action and the firing of each subsequent round of ammunition thus compounding a very dangerous situation.

The principal object of this invention is to provide an automatic safety firing control for the primary trigger mechanism of repeating type Shotguns of the class described mounted as a supplemental appendage to the primary trigger mechanism and the trigger guard bow assembly that will positively automatically control said trigger mechanism against inadvertent discharge of the loaded round of ammunition chambered in the rearm by the manipulation of the repeating action until the bolt of said firearm is positively and completely closed on said chambered round and the trigger mechanism fully released.

A further object of this invention is to provide an automatic safety control means for the primary trigger mechanism of repeating Shotguns of the slide action type that is relatively unobtrusive when applied to the primary trigger and trigger guard bow assembly of said repeating shotgun and which is relatively simple to install and adjust.

A further object of this invention is to provide an automatic safety firing control for the primary trigger mechanism of a repeating type shotgun of the class described wherein the said trigger mechanism is automatically held positively positioned against hammer release until such time the repeating action of the repeating type shotgun is fully and positively closed on a chambered round of loaded ammunition.

A still further object of this invention is to provide an automatic safety firing control for the primary trigger mechanism of a repeating type shotgun of the type described, the same is externally attached to said shotgun in its entirety.

These and other objects of the invention will become apparent from the following specification and claims when taken in conjunction with the accompanying drawing, in which drawing, like characters indicate like parts throughout the several views.

To the above end, generally stated, the invention consists of the following devices and combination of devices hereinafter described and defined in the claims.

Referring to the drawing:

FIG. 1 is a fragmentary side elevational view of a slide action repeating type shotgun showing the invention mounted thereon.

FIG. 2 is a side elevational view on an enlarged scale showing the invention mounted in the trigger guard bow 3,l84,875 Patented May 25, 1965 ICC of a repeating shotgun of the slide action type the several elements of the invention being shown in firing position.

FIG. 3 is a view similar to FIG. 2 with the exception that the several elements of the invention are shown as positioned when the trigger mechanism has been pulled to discharge the firearm.

FIG. 4 is a side elevational view of the opposite side of the invention from that shown in FIGS. l, 2, and 3, portion of the firearm being broken away.

FIG. 5 is a top plan view of the working elements of the invention with the trigger actuating mechanism in released position, taken on the line 5 5 of FIG. 2 and FIG. 6 is a view similar to FIG. 5 taken on the line 6 6 of FIG. 3 with the trigger actuating mechanism in its rearwardmost position at the instant of discharging the firearm.

Referring more specifically to the drawing, the numeral '7 will hereinafter be directed to a firearm of the type generally known in the trade as a repeating shotgun of the slide action type to which the invention is applied as a supplemental appendage as a firing control mechanism to prevent inadvertent discharge of the firearm if the shooter neglects to release the primary trigger mechanism by relaxing pressure of the trigger finger on the primary trigger mechanism between firing sequences. As has been stated, the present invention will positively and automatically prevent inadvertent discharge of a round of ammunition chambered in the firearm.

The invention which is actually a secondary trigger mechanism, must be completely released before the primary trigger mechanism may be subsequently positioned to again actuate the firing mechanism and thus discharge the loaded round of ammunition chambered in the said firearm.

The numeral S is directed to a mounting plate that is rigidly secured externally, as shown, to the left hand side portion of the conventional trigger guard bow of a conventional firearm 7 by means of upper and lower screws lll) and 11 respectively adjacent the rear end portion of said trigger guard bow 9 and immediately adjacent the primary trigger 12 with which the invention cooperates.

Pivotally mounted on the said mounting plate 8 by means of a threaded screw 13 is a secondary trigger mechanism 14 in the form of a relatively wide plate having an inturned flange l formed along its forward edge portion. This secondary trigger mechanism 14 is spring loaded by means of a spring l5 whereby the said secondary trigger 14 is normally held in released position.

This spring 15 at its upper end portion is provided with a hook 16 having engagement with a stud 17 rigidly secured in the said mounting plate 8 and projecting inwardly thereof. Said spring 15 is thence passed over the head of the threaded mounting screw 13 and thence under tension into engagement with the inturned ange 1S of the secondary trigger 1d which, in cooperation with the stud 17 afford bases of resistance whereby said secondary trigger 14 is normally held in released position, see FIGS. 2 and 3 particularly.

Formed in the lower edge portion of the secondary trigger ifi, substantially at the transverse center thereof is a stop notch 19 cooperating with a stop pin 20, whereby pivotal movement of the said secondary trigger is limited against forward and rearward movements.

Rigidly secured to the secondary trigger 14 by means of a rivet Z1 at the forward edge portion thereof is an upwardly and rearwardly inclined flat spring 21 having an inwardly projecting stud 22 positioned. for releasable engagement with one edge of the forward surface, see numeral 23, of the primary trigger 12 substantially at the central portion thereof.

When the secondary trigger is in a released position by the action of the spring 14, the stud 22 is positioned as described above and the flat spring 21 is inwardly sprung to lightly engage the side of the primary trigger 12 forwardly of the stud22. From this point the said flat spring 21 extends into a notch 24 that is formed in a stud 25 which is rigidly mounted on the mounting plate 8 and projects inwardly thereof. This notch 24 is provided with an outwardly inclined ramp 26 which has engagement with the extreme outer end portion of the llat spring 21 for a purpose that will presently appear.

It will be obvious by referenceV to the drawing, and assuming that the trigger mechanism ofthe firearm is cocked to discharge a round of loaded ammunition in the chamber thereof that when the secondary trigger 14 is pulled,

lpressure of the trigger actuating stud 22 engaging the said primary trigger 14, will cause the liring mechanism of the Ylirearm 7 toV discharge the loaded round of ammunition in ing stud Y22 clears the primary trigger 12 transversely thereby permitting said primary trigger to be automatically released from engagement therewith and returned to normal released position for a succeeding shot by its own spring action, not shown.

Obviously, the firearm cannot again be lired until linger pressure -on the secondary trigger 14 is released complete- ,ly and said secondary trigger returned to normal tiring position for succeeding shots by the action of its spring V15 on the primary trigger.

Thus, if the shooter inadvertently continues to apply linger pressure on the secondary trigger 14 the lirearm cannot be discharged merely by actuating the repeating mechanism of the firearm while the primary trigger is inadvertently held back. By the use of my invention said trigger while having been automatically returned to normal liring position it cannot be actuated except by an engagement of said primary trigger with the stud 25 mounted on the llat spring of the secondary trigger 14. The said secondary trigger 14 must be fully released between shots as it cannot again engage the primary trigger unless this sequence is followed as the actuating of the secondary trigger, discharges the firearm and will automatically render the primary trigger inoperable until the same can again be engaged by the stud25 and this cannot occur until the secondary trigger has been completely released.

While there are herein disclosed but a limited number of embodiments of the structure, process and product of Vthe invention herein presented, it is possible to produce still other embodiments without departing from the inventive concept herein disclosed, and it is desired, there- Vfore, that only such` limitations be imposed on the appended claims as are stated herein or required by the t prior art.

CII

mary trigger whereby said primary trigger is manipulated to discharge the rearm, spring means secured to the mounting plate extending into engagement with the secondary trigger to thus position the same for succeeding release after each round of ammunition has been discharged from said shotgun and stop means formed in the lower edge portion of the secondary trigger cooperating with a stop pin mounted on, and extending inwardly of the mounting plate in register with said stop means on the secondary trigger to thus limit the pivotal movement of said secondary trigger, actuating means rigidly mounted on the secondary trigger for engagement with the primary trigger when the secondary trigger is pulled, said actuating means having engagement at its rear end portion with cam means in the form of a ramp whereby said primary trigger actuating means is transversely moved out of engagement with said primary trigger at the end of the rearward movement of the primary trigger to thus release the same from engagement with the secondary trigger for return to normal released position by means of its arm spring return means.

2. A safety liring control device acting on the primary trigger mechanism of repeating Shotguns of the slide action type, comprising in combination a primary trigger mechanism cooperating with the repeating action to discharge a loaded round of ammunition chambered in said shotgun, a conventional trigger guard bow on said shotgun affording a mounting station for a mounting plate that is rigidly secured thereto adjacent the rear end portion of said trigger guard bow, a secondary trigger mechanism pivotally mounted on the said mounting plate and having stop means associated with the secondary trigger mechanism and the mounting plate whereby the movement of the secondary trigger is positively limited relative to the primary trigger mechanism, a tlat leaf-type spring is rigidly secured to the forward portion of the secondary trigger .and is projected at an upwardly and rearwardly inclined angle to intersect the primary trigger at one side thereof substantially at the longitudinal center thereof and an inwardly projecting transversely notched stud is rigidly secured to the mounting plate extending inwardly thereof to engage the free rear end portion .of the llatV spring as the same is moved rearwardly endwise by movement of the secondary trigger, a transversely disposed cam-like ramp outwardly inclined is formed in said notch to receive the end portion of the llat spring on which is mounted a stud having engagement with one side portion of the primary trigger when said primary trigger and the secondary trigger are in released position, said stud on the llat spring affording releasable engagement between said triggers wherein, when the ,said secondary trigger is pulled, the

stud acting on the primary trigger will move the same rearwardly suiciently to discharge the primary trigger mechanism via the primary trigger and thence as the secondary trigger continues to be moved rearwardly, the cam-like ramp acting on the flat spring will move the stud mounted thereon out of engagement with the primary trigger to thus permit the sameto by-pass the stud and return to normal released position by its own spring action. i

3. The structure of claim 2 wherein the llat Vspring mounted on the secondary trigger is inwardly sprung from its anchor point into engagement withY one side portion of the primary trigger actuating stud immediately forwardly of said primary trigger.

No references cited.

BENJAMIN A. BORCHELT, Primary Examiner. 

1. A SAFETY FIRING CONTROL DEVICE FOR THE PRIMARY TRIGGER MECHANISM FOR REPEATING SHOTGUNS OF THE SLIDE ACTION TYPE COMPRISING IN COMBINATION, A SECONDARY TRIGGER MECHANISM MOUNTED ON THE TRIGGER GUARD BOW OF SAID REPEATING SHOTGUN, A MOUNTING PLATE RIGIDLY SECURED TO SAID GUARD BOW AT THE REAR END PORTION THEREOF AND A SECONDARY TRIGGER MECHANISM PIVOTALLY MOUNTED ON INSIDE SURFACE OF THE MOUNTING PLATE AND HAVING ENGAGEMENT WITH THE PRIMARY TRIGGER WHEREBY SAID PRIMARY TRIGGER IS MANIPULATED TO DISCHARGE THE FIREARM, SPRING MEANS SECURED TO THE MOUNTING PLATE EXTENDING INTO ENGAGEMENT WITH THE SECONDARY TRIGGER TO THUS POSITION THE SAME FOR SUCCEEDING RELEASE AFTER EACH ROUND OF AMMUNITION HAS BEEN DISCHARGED FROM SAID SHOTGUN AND STOP MEANS FORMED IN THE LOWERE DGE PORTION OF THE SECONDARY TRIGGER COOPERATING WITH A STOP PIN MOUNTED ON, AND EXTENDING INWARDLY OF THE MOUNTING PLATE IN REGISTER WITH SAID STOP MEANS ON THE SECONDARY TRIGGER TO THUS LIMIT THE PIVOTAL MOVEMENT OF SAID SECONDARY TRIGGER, ACTUATING MEANS RIGIDLY MOUNTED ON THE SECONDARY TRIGGER FOR ENGAGEMENT WITH THE PRIMARY TRIGGER WHEN THE SECONDARY TRIGGER IS PULLED, SAID ACTUATING MEANS HAVING ENGAGEMENT AT ITS REAR END PORTION WITH CAM MEANS IN THE FORM OF A RAMP WHEREBY SAID PRIMARY TRIGGER ACTUATING MEANS IS TRANSVERSELY MOVED OUT OF ENGAGEMENT WITH SAID PRIMARY TRIGGER AT THE END OF THE REARWARD MOVEMENT OF THE PRIMARY TRIGGER TO THUS RELEASE THE SAME FROM ENGAGEMENT WITH THE SECONDARY TRIGGER FOR RETURN TO NORMAL RELEASED POSITION BY MEANS OF ITS ARM SPRING RETURN MEANS. 